Olive Jones, 54, yesterday that she has been made a victim of religious persecution for discussing her faith with the child and her mother, who complained about her behaviour.
After she was sacked, she was told the family had strongly objected to her approach because they are non-believers, and that a formal complaint had been lodged about her.
Since Mrs Jones worked only 12 hours a week and had no formal contract, her job with the North Somerset Tuition Service in Nailsea, near Bristol, ended with immediate effect.
The mother-of-two said she was made to feel “like a criminal” and claims that Christians are being persecuted in the name of “political correctness”.
Mrs Jones, of Weston-super-Mare, Somerset, said she lost her job shortly after making her sixth visit to the GCSE Maths student.
“I told the girl and her mother that there were people praying for them, and I asked the child if I could pray for her.
“She looked at her mother, who said: `We come from a family who do not believe` so I did not pray.”
Mrs Jones thought she left the family’s home on good terms but hours later was summoned to a meeting with her superiors.
“You could feel the tension in the air,” she said. “I was so frightened I could hardly breathe.
“I had never experienced anything like this before. I had a faultless record stretching back 20 years and yet was left a total wreck.”